The effective atomic number for [Rh(H₂O)₆]³⁺ (atomic number for Rh is 45) is

Options

(a) 42
(b) 45
(c) 48
(d) 54

Correct Answer:

54

Explanation:

EAN = Atomic number of the central metal – number of electrons lost in ion formation + number of electrons gained from the donor atom of the ligands. 45 – 3 + 2* 6 = 45 – 3 + 12 = 54.